Form 8.3 -SPIRENT COMMUNICATIONS PLC

FORM 8.3

PUBLIC OPENING POSITION DISCLOSURE/DEALING DISCLOSURE BY

A PERSON WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR

MORE

Rule 8.3 of the Takeover Code (the "Code")

1.

KEY INFORMATION

(a)

Full name of discloser:

Barclays PLC.

(b)

Owner or controller of interest and short

positions disclosed, if different from 1(a):

(c)

Name of offeror/offeree in relation to whose

SPIRENT COMMUNICATIONS PLC

relevant securities this form relates:

(d)

If an exempt fund manager connected with an

offeror/offeree, state this and specify identity of

offeror/offeree:

(e)

Date position held/dealing undertaken:

26 Jul 2024

(f)

In addition to the company in 1(c) above, is the discloser making

NO

disclosures in respect of any other party to the offer?

2.

POSITIONS OF THE PERSON MAKING THE DISCLOSURE

(a)

Interests and short positions in the relevant securities of the offeror or offeree

to which the disclosure relates following the dealing(if any)

Class of relevant security:

3 1/3p ordinary

Interests

Short Positions

Number

(%)

Number

(%)

(1)

Relevant securities owned

and/or controlled:

21,058,759

3.64%

1,107,256

0.19%

(2)

Cash-settled derivatives:

and/or controlled:

757,799

0.13%

20,618,828

3.56%

(3)

Stock-settled derivatives (including options)

and agreements to purchase/sell:

0

0.00%

0

0.00%

TOTAL:

21,816,558

3.77%

21,726,084

3.75%

(b)

Rights to subscribe for new securities (including directors and other executive

options)

Class of relevant security in relation to

which subscription right exists

Details, including nature of the rights

concerned and relevant percentages:

3.

DEALINGS (IF ANY) BY THE EXEMPT PRINCIPAL TRADER

(a)

Purchases and sales

Class of relevant

Purchase/sale

Number of

Price per unit

security

securities

3 1/3p ordinary

Purchase

162,321

1.7614 GBP

3 1/3p ordinary

Purchase

112,724

1.7462 GBP

3 1/3p ordinary

Purchase

92,738

1.7565 GBP

3 1/3p ordinary

Purchase

73,737

1.7390 GBP

3 1/3p ordinary

Purchase

63,275

1.7502 GBP

3 1/3p ordinary

Purchase

39,875

1.7552 GBP

3 1/3p ordinary

Purchase

39,256

1.7526 GBP

3 1/3p ordinary

Purchase

35,569

1.7389 GBP

3 1/3p ordinary

Purchase

22,948

1.7572 GBP

3 1/3p ordinary

Purchase

20,888

1.7576 GBP

3 1/3p ordinary

Purchase

11,500

1.7400 GBP

3 1/3p ordinary

Purchase

10,115

1.7731 GBP

3 1/3p ordinary

Purchase

9,426

1.7574 GBP

3 1/3p ordinary

Purchase

7,467

1.7568 GBP

3 1/3p ordinary

Purchase

6,446

1.7613 GBP

3 1/3p ordinary

Purchase

5,084

1.7577 GBP

3 1/3p ordinary

Purchase

4,546

1.7563 GBP

3 1/3p ordinary

Purchase

2,966

1.7535 GBP

3 1/3p ordinary

Purchase

1,635

1.7430 GBP

3 1/3p ordinary

Sale

404,330

1.7408 GBP

3 1/3p ordinary

Sale

333,005

1.7391 GBP

3 1/3p ordinary

Sale

196,700

1.7338 GBP

3 1/3p ordinary

Sale

151,823

1.7569 GBP

3 1/3p ordinary

Sale

123,516

1.7445 GBP

3 1/3p ordinary

Sale

92,738

1.7565 GBP

3 1/3p ordinary

Sale

77,925

1.7390 GBP

3 1/3p ordinary

Sale

57,078

1.7358 GBP

3 1/3p ordinary

Sale

51,461

1.7395 GBP

3 1/3p ordinary

Sale

44,162

1.7399 GBP

3 1/3p ordinary

Sale

27,062

1.7386 GBP

3 1/3p ordinary

Sale

20,478

1.7417 GBP

3 1/3p ordinary

Sale

12,334

1.7638 GBP

3 1/3p ordinary

Sale

8,729

1.7392 GBP

3 1/3p ordinary

Sale

6,297

1.7461 GBP

3 1/3p ordinary

Sale

5,078

1.7400 GBP

3 1/3p ordinary

Sale

2,117

1.7555 GBP

3 1/3p ordinary

Sale

1,917

1.7450 GBP

(b)

Cash-settled derivative transactions

Class of

Product

Nature of dealing

Number of

Price per

relevant

description

reference

unit

security

securities

3 1/3p ordinary

SWAP

Opening Short

8,081

1.7577 GBP

3 1/3p ordinary

SWAP

Decreasing Short

31,421

1.7307 GBP

3 1/3p ordinary

SWAP

Increasing Short

100,856

1.7679 GBP

3 1/3p ordinary

CFD

Decreasing Short

4,591

1.7382 GBP

3 1/3p ordinary

CFD

Decreasing Short

77,925

1.7389 GBP

3 1/3p ordinary

CFD

Increasing Short

72,857

1.7389 GBP

3 1/3p ordinary

CFD

Increasing Short

6,300

1.7502 GBP

3 1/3p ordinary

SWAP

Increasing Short

25,919

1.7598 GBP

3 1/3p ordinary

SWAP

Decreasing Short

21,933

1.7426 GBP

3 1/3p ordinary

SWAP

Increasing Short

29,457

1.7498 GBP

3 1/3p ordinary

SWAP

Increasing Short

693

1.7480 GBP

3 1/3p ordinary

SWAP

Decreasing Short

327,003

1.7391 GBP

3 1/3p ordinary

SWAP

Decreasing Short

43,367

1.7399 GBP

3 1/3p ordinary

SWAP

Decreasing Short

397,042

1.7408 GBP

3 1/3p ordinary

SWAP

Decreasing Short

121,291

1.7445 GBP

3 1/3p ordinary

SWAP

Decreasing Short

6,185

1.7461 GBP

3 1/3p ordinary

SWAP

Decreasing Short

6,002

1.7391 GBP

3 1/3p ordinary

SWAP

Decreasing Short

795

1.7399 GBP

3 1/3p ordinary

SWAP

Decreasing Short

7,288

1.7408 GBP

3 1/3p ordinary

SWAP

Decreasing Short

2,225

1.7445 GBP

3 1/3p ordinary

SWAP

Decreasing Short

112

1.7461 GBP

3 1/3p ordinary

SWAP

Increasing Short

11,500

1.7400 GBP

3 1/3p ordinary

SWAP

Increasing Short

10,115

1.7731 GBP

3 1/3p ordinary

SWAP

Decreasing Short

12,334

1.7638 GBP

3 1/3p ordinary

SWAP

Increasing Short

3,766

1.7390 GBP

3 1/3p ordinary

SWAP

Increasing Short

112,724

1.7462 GBP

3 1/3p ordinary

SWAP

Increasing Short

35,245

1.7518 GBP

3 1/3p ordinary

SWAP

Decreasing Short

8,729

1.7392 GBP

3 1/3p ordinary

SWAP

Increasing Short

22,948

1.7572 GBP

3 1/3p ordinary

SWAP

Increasing Short

5,797

1.7573 GBP

3 1/3p ordinary

SWAP

Increasing Short

1,410

1.7596 GBP

3 1/3p ordinary

SWAP

Increasing Long

54,500

1.7064 GBP

3 1/3p ordinary

SWAP

Increasing Long

56,700

1.7414 GBP

3 1/3p ordinary

SWAP

Increasing Long

85,500

1.7462 GBP

3 1/3p ordinary

SWAP

Increasing Long

173,800

1.7488 GBP

3 1/3p ordinary

SWAP

Increasing Short

2,802

1.7390 GBP

3 1/3p ordinary

SWAP

Increasing Short

84,185

1.7502 GBP

(c)

Stock-settled derivative transactions (including options)

(i)

Writing, selling, purchasing or varying

Class

Product

Writing,

Number

Exercise

Type

Expiry

Option

of

description

purchasing,

of

price

date

money

relevant

selling,

securities

per unit

paid/

security

varying etc

to which

received

option

per unit

relates

(ii)

Exercising

Class of relevant

Product description

Exercising/ exercised against

Number of

Exercise price per

security

securities

unit

(d)

Other dealings (including subscribing for new securities)

Class of relevant

Nature of Dealings

Details

Price per unit (if

security

applicable)

4.

OTHER INFORMATION

(a)

Indemnity and other dealings arrangements

Details of any indemnity or option arrangement, or any agreement or understanding,

formal or informal, relating to relevant securities which may be an inducement to deal

or refrain from dealing entered into by the exempt principal trader making the disclosure and any party

to the offer or any person acting in concert with a party to the offer:

NONE

(b)

Agreements, arrangements or understandings relating to options or derivatives

Details of any agreement, arrangement or understanding, formal or informal, between

the person making the disclosure and any other person relating to:

(i) the voting rights of any relevant securities under any option; or

(ii) the voting rights of future acquisition or disposal of any relevant securities to which

any derivative is referenced:

NONE

(c)

Attachments

Is a Supplemental Form 8 (Open Positions) attached?

NO

Date of disclosure:

29 Jul 2024

Contact name:

Large Holdings Regulatory Operations

Telephone number:

020 3134 7213